제주지역 골프장의 예지물 퇴비화 방안에 관한 연구

Abstract

As of January 2009, the number of golf courses in Jeju Island reached 35(26 are under operation). The 2007 grass clippings volume totaled 3,392 tons, of which 3,232.1 tons (95.3%) were incinerated and 46.9 tons (1.5%) were utilized. Also, most of grass clippings in golf courses are found to be incinerated and disposed of. - ⅰ - In this study, in line with the country's recent big policy, low carbon green growth, measures were examined to develop technologies for turning grass clippings from golf courses into compost as part of recycling wastes, with a view to developing stable, fine-quality organic resources, and fully utilizing them. To turn golf course grass clippings incinerated into compost, a by-product fertilizer which is made from food garbage (70%) and sawdust (30%) by Jeju Garbage Treatment Center, was used. This by-product fertilizer was mixed with grass clippings with the same weight, which, before the test, then was made to undergo one month of compost making and maturing. The resulting grass clippings compost (tentative name) was utilized as the seeding. In addition, additive materials such as sawdust and coconut peat were used. As a result of the test, for making aerobic grass clippings compost, the optimal ratio of materials was found to be 3∼4 : 1 : 0.5 for grass clippings, sawdust, and seeding, respectively, in terms of weight. If sawdust is difficult to supply, or the import price of coconut peat is low, coconut peat can be added to the materials. The characteristics of agricultural chemical residues in the grass clippings compost were analyzed; the chemicals were prompted to be decomposed through the high-temperature and high humidity mature process, and thus small amounts of hexaconazole and azoxystrobin at 0.181mg/kg and 0.049mg/kg, respectively, were detected. But, other agricultural chemical components were not detected. As such, when utilizing grass clippings compost to grow various crops, the hazards of residues of agricultural chemicals are thought to be insignificant. - ⅱ -